Complete Compiled Specification.pdf - Peck Ormsby Construction

Ground joint unions shall be installed on pipe 2-1/2" and under where indicated on drawings. Whenever piping
is connected to a major piece of apparatus, unions shall be provided as near as practical on each side of the
apparatus.
ISOLATION FITTINGS:
Approved isolation fittings shall be installed at the junction of all copper and steel piping to prevent electrolytic
action. Fittings shall be as manufactured by Walter Vallett Co., Corrosion Services, or approved equal.
THERMOMETERS:
General: Provide liquid-in-glass type thermometers unless bimetal dial type is required due to space limitations
or other specific conditions.
Scale and Dial: Provide liquid-in-glass thermometers of the organic liquid type having a nominal scale length of
not less than 7 inches. Provide bimetal dial thermometers with a nominal 5-inch dial size graduated through a
minimum arc of 270 degrees. Provide a recessed dial so that graduated portion and pointer are in the same
plane.
Range: Temperature range shall be as shown on the drawings or as specified. Chilled water system 20
degrees F. to 120 degrees F.
Case: Provide liquid-in-glass type thermometer with an aluminum alloy or steel case. Provide bimetal dial
thermometers with all exposed metal parts, including the case and stem made of 300 Series stainless steel, all
welded construction.
Accuracy and Calibration: Bimetal dial thermometers shall have zero adjustment for recalibration and shall have
an accuracy of plus or minus one percent of span through the complete range. Liquid-in-glass thermometers
used for indicating shall have an accuracy of plus or minus 0.5 degree F. Unless otherwise required in other
sections of the specifications, thermometers for commissioning tests shall have an accuracy of plus or minus
0.25 degree F.
Thermometers measuring temperature for energy calculations shall have an accuracy of plus or minus 0.1
degree F.
Thermometer Wells: Provide pipe line liquid-in-glass thermometers with a union connection, tapered bulb
chamber and matching taper on well. Provide bimetal dial thermometers with a well to match bulb chamber.
Provide wells for insulated pipe of the extension neck type suitable for insulation thickness. Provide wells
fabricated of bronze, brass or 316 stainless steel suitable for the fluid or gas in the pipe.
Stem: Provide stems with a minimum length of 2-1/2 inches immersion which shall be increased in length as
necessary to reach the center lines of the pipes in which they are installed.
Adjustment: Provide straight or angle pattern adjustable type thermometers as required to facilitate readings.
Thermometers shall be Palmer, Trerice, Marsh or Weiss. Install all thermometers so as to be easily readable
from the floor.
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SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDTION March 2, 2009
BASIC MATERIALS & METHODS 15050-13